Grigorios Papamichael studied Theology in the School of Halki. After teaching for some years in Sofia, he earned his PhD from the University of St. Petersburgh. From 1905 to 1907, he taught in the Theological School of Jerusalem. He became the chief editor of 'Ekklisiastikos Faros' and 'Pantainos' and in 1918, he was elected in the Chair of Apologetics in the University of Athens. He also taught in the Rizareios school, which he directed from 1937 to 1940.

Panagiotis Trempelas is considered the most productive Greek theologician of the 20th century. He studied in the University of Athens from ehich he graduated in 1907. He was elected Professor of Practical Theology in the same university in 1939, a chair he held until 1957. He was also one of the founders of the 'Zoi' and later of 'Sotir'.